As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING AN INSPECTION, THE OPERATOR NOTICED THAT THE INSULATION INSTALLED OVER THE HEATED SILICONE GALLEY DRAIN HOSE (INSTALLED BY MODIFICATION DATA SUMMARY D48100) SHOWED SIGNS OF OVERHEATING. AFTER REMOVING THE INSULATION, IT WAS DISCOVERED THAT THE RIBBON HEATER EXHIBITED SIGNS OF OVERHEATING AND WAS THE SOURCE OF THE PROBLEM. SUBSEQUENTLY, THE SILICONE DRAIN HOSE ALSO SUFFERED THE EFFECTS OF THIS OVERHEATING CONDITION.